While preparing a sterile surgical trolley, the nurse notices that the sterile drape is hanging over the edge of the trolley. What is the most appropriate action?

Appeared in: NORCET 10 Prelims-2026

Explanation

The core principle of surgical asepsis dictates that any part of a sterile drape hanging below the tabletop is considered contaminated.
This is because the hanging portion is out of the nurse's direct line of sight and can easily touch non-sterile items like clothing or the trolley legs.
Once any part of the sterile field is compromised, the entire field is considered contaminated to prevent any risk of surgical site infection.
The only safe and correct action is to discard the entire setup and start over with a new sterile field, ensuring patient safety.

Option A: Continuing to work ignores a known break in sterility. It creates a false sense of security and puts the patient at high risk for infection.
Option B: Folding the contaminated hanging part back onto the trolley would directly introduce microorganisms from the non-sterile edge to the sterile surface, contaminating the entire field.
Option D: Covering a contaminated area does not make it sterile. Microorganisms can still be transferred from the underlying contaminated drape to the new sterile cloth or to instruments placed upon it.

Visual 1: Diagram - A diagram illustrating the 'sterile zone' of a draped trolley, showing the top surface as sterile and the edges/hanging parts as contaminated.
Visual 2: Infographic - An infographic listing the key principles of surgical asepsis with simple icons for each principle (e.g., an eye for 'keep in sight', a water droplet with a cross for 'moisture contaminates').

Clinical Relevance

Nursing practice connection: Knowing Principles of surgical asepsis and maintaining a sterile field helps nurses interpret findings accurately and avoid errors in routine assessment, medication administration, and patient teaching.
Strict adherence to aseptic technique is the single most important factor in preventing surgical site infections (SSIs), a major cause of postoperative morbidity and mortality.
Nurses are the primary guardians of the sterile field. Recognizing and immediately correcting any break in sterility is a critical responsibility.
What if? - If a sterile instrument, not the drape, had fallen to the floor, the correct action would be to have a circulating nurse provide a new sterile instrument. The entire field would not need to be discarded unless the falling instrument contaminated the field itself.

How to Approach the Question

First, identify the core issue in the question: a potential break in sterility.
Recall the fundamental principles of surgical asepsis. Specifically, consider the rules for sterile fields, edges, and areas below the waist.
Evaluate each option against these principles. The question asks for the 'most appropriate' action, which in a sterility context means the safest action.
Option A (ignore) violates the principle of addressing contamination.
Option B (fold) violates the principle that sterile only touches sterile by bringing a contaminated surface onto a sterile one.
Option D (cover) is a common misconception but is incorrect as it doesn't eliminate the source of contamination.

Concept Tested & Keywords

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Practise the full NORCET 10 Prelims-2026

Attempt every question from this paper in a timed mock, then review the full solution for each one.